i am trying to make a flash loan too. i saw some codes on how to buy on kyber and sell on uniswap
https://github.com/jklepatch/eattheblocks/tree/master/profitable-flashloans/24-buy-kyber-sell-uniswap you can check it out.. you can email me so we talk more about it forsonfranklin @gmail
Is it possible for attackers to hack a wallet without private keys and seed?
No it is not possible.
Ways to hack a mobile wallet
User signing a wrong transaction: Do not interact with any portals from non-reputable and/or anonymous teams
Ways to hack a desktop wallet
Malware. trojan, etc. on a desktop computer
If you're swapping tokens with hard coded tax inside on their smart contract (in your case 10%). The "minimum token" appearing on the website is wrong, because it is based on normal token contract with no tax/fees.